The Problem

On Realme GT Neo 3 (ColorOS 13), every standard Android permission grant route is blocked — pm grant, appops set, and settings put all refuse to grant WRITE_SECURE_SETTINGS. So you can't write a normal app that toggles the SIM network mode in the background.

The Solution

A CLEAR_TASK deep-link to Settings$MobileNetworkActivity. The user adds the NetSwitch quick-settings tile (or home-screen widget) and taps it — the Settings app opens directly on the SIM network mode page, ready to toggle in 2 taps. The app itself declares zero permissions in its manifest.

What Stands Out

• TileService API for system-level integration (API 24+)
• AppWidgetProvider for home-screen access
• CLEAR_TASK deep-link to Settings$MobileNetworkActivity
• Zero permissions declared — privacy-first by design
• Single Kotlin module, <100 LOC of meaningful code
• Works on ColorOS, MIUI, OneUI, stock AOSP

Tech Stack